Solar Energy Absorber

Abstract

It aims to provide a solar heat collecting apparatus that can efficiently collect energy from solar light. The solar heat collecting apparatus comprises an opened container part 22 that accumulates heat, a closed part 25 that closes the container part 22 and has an opening part 26 to let the collected solar light in, and a light absorbing part 36 that absorbs the solar light dispersed by passing through the opening part 26 so that it is converted into heat.

1 - 14 . (canceled) 
     
     
         15 . A solar heat collecting apparatus, comprising:
 a heat-insulating container comprising a circumferential wall and a bottom wall configured as a heat-insulating wall, and an upper part closed with a heat-insulating closing member having a translucent opening window formed therein;   a light absorbing body contained within the heat-insulating container; and   a light collecting mechanism located outside the heat-insulating container and disposes with a focal position substantially matches with position of the translucent opening window formed in the closing member of the heat-insulating container,   wherein, the heat-insulating container is filled with a liquid medium to a liquid level in which the light absorbing body within the heat-insulating container is immersed therein, and configured such that the solar light entering from the translucent opening window is absorbed by the light absorbing body and transformed to heat energy for heating the liquid medium.   
     
     
         16 . The solar heat collecting apparatus as defined in  claim 15 , wherein the translucent opening window comprises at least one elongated slit, and the heat-insulating container is positioned such that the lengthwise direction of the slit is directed substantially along a movement path of the diurnal motion of the sun. 
     
     
         17 . The solar heat collecting apparatus defined in  claim 16 , wherein the width of the slit of the opening window is dimensioned corresponding to the diameter of the sun imaged by the light collecting mechanism. 
     
     
         18 . The solar heat collecting apparatus as defined in  claim 16 , wherein the width of the slit of the opening window is substantially five times as large as the diameter of the sun imaged by the light collecting mechanism. 
     
     
         19 . The solar heat collecting apparatus as defined in  claim 16 , wherein the lengthwise direction of the slit of the opening window is substantially east-west direction. 
     
     
         20 . The solar heat collecting apparatus as defined in  claim 16 , wherein the light collecting mechanism comprises a plurality of lenses arranged to collect the solar light at different positions in the lengthwise direction of the slit of the opening window. 
     
     
         21 . The solar heat collecting apparatus as defined in  claim 20 , wherein a plurality of slits are formed in parallel and spaced from each other in the width direction, and the light collecting mechanism comprises a plurality of lenses provided corresponding to each of the slits. 
     
     
         22 . The solar heat collecting apparatus as defined in  claim 16 , wherein a tracking mechanism is provided to track the annual motion of the sun to change at least one of an orientation of an optical axis of the light collecting mechanism or an orientation of the opening window within a plane perpendicular to the lengthwise direction of the slit. 
     
     
         23 . The solar heat collecting apparatus as defined in  claim 15 , wherein the light collecting mechanism is at least one Fresnel lens. 
     
     
         24 . The solar heat collecting apparatus as defined in  claim 23 , wherein one of the sides of the Fresnel lens oriented to the heat-insulating container is curved to form a concave. 
     
     
         25 . The solar heat collecting apparatus as defined in  claim 15 , wherein the opening window formed in the closing member of the heat-insulating container is arranged at a position reentrant than other portion of the closing member and immersed in the medium with the heat-insulating container. 
     
     
         26 . The solar heat collecting apparatus as defined in  claim 15 , wherein the translucent opening window of the closing member is mounted with a light guide including an upper part having an entrance and a lower part having an exit provided with an inner surface formed as reflecting surface, wherein the upper part of the light guide has a cross-section gradually widening from the entrance part towards the lower part, and the lower part has a cross-section gradually narrowing towards the exit. 
     
     
         27 . The solar heat collecting apparatus as defined in  claim 16 , wherein the slit configuring the opening window is mounted with an elongated light guide which an upper part having an entrance and a lower part having an exit and provided with an inner surface formed as reflection surface, wherein the upper part of the light guide has a cross-section gradually widening from the entrance towards the upper part, the lower part has a cross-section gradually narrowing towards the exit, and the light guide having a shaped in which height thereof is low at the center part in the lengthwise direction and high at both ends.